EP1257148A2 - Haut-parleur pour un dispositif de communication portatif - Google Patents

Haut-parleur pour un dispositif de communication portatif Download PDF

Info

Publication number
EP1257148A2
EP1257148A2 EP02253148A EP02253148A EP1257148A2 EP 1257148 A2 EP1257148 A2 EP 1257148A2 EP 02253148 A EP02253148 A EP 02253148A EP 02253148 A EP02253148 A EP 02253148A EP 1257148 A2 EP1257148 A2 EP 1257148A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm
permanent magnet
voice coil
loudspeaker
voice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02253148A
Other languages
German (de)
English (en)
Other versions
EP1257148A3 (fr
Inventor
Kazumi Miyamoto
Masahito Furuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Electronics Co Ltd
Original Assignee
Citizen Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Electronics Co Ltd filed Critical Citizen Electronics Co Ltd
Publication of EP1257148A2 publication Critical patent/EP1257148A2/fr
Publication of EP1257148A3 publication Critical patent/EP1257148A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/063—Loudspeakers using a plurality of acoustic drivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/026—Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the present invention relates to a loudspeaker for a portable communication instrument such as a portable telephone.
  • the loudspeaker provided in the movable telephone is used as a speaker for reproducing a calling information sound in response to a calling signal and as a receiver for converting a voice signal into voice.
  • a loudspeaker having a wide frequency range of 20 Hz ⁇ 20 KHz is mounted in the portable telephone.
  • another loudspeaker having a narrow frequency range of 300 Hz ⁇ 3 KHz for converting the voice signal into the voice is also provided in the portable telephone.
  • two loudspeakers having wide and narrow frequency ranges are provided in one case.
  • Fig. 2 shows such a composite speaker.
  • the speaker has a cylindrical case 1 having an annular projection 1b inwardly projected from the inside wall of an upper portion of the case.
  • An annular yoke 2 is secured to the inside wall of the projection 1b at a cylindrical portion 2a.
  • An annular permanent magnet 3 is secured to the underside of the yoke 2.
  • Apole piece 4 is secured to the underside of the permanent magnet 3 at a flange 4a.
  • a first diaphragm 6 is secured to the upper surface of the yoke 2 at a peripheral portion thereof by a first protector 9.
  • a second diaphragm 8 is secured to the underside of the case 1 by a second protector 10.
  • the first voice coil 5 is disposed in a magnetic gap 11 between the inside wall of the yoke 2 and the outside wall of a center pole 4b of the pole piece 4.
  • the second voice coil 7 is disposed in a magnetic gap 12 between the inside wall of the cylindrical portion 2a of the yoke 2 and the flange 4a of the pole piece 4.
  • a plurality of sound discharge holes 13 and 14 are provided in the first protector 9 and in the second protector 10, and a plurality of back holes 1a are formed in the case 1.
  • the first voice coil 5 and the first diaphragm 6 are used for a receiver for converting a voice signal into voice
  • the second voice coil 7 and the second diaphragm 8 are used for a speaker for reproducing a calling information sound in response to a calling signal.
  • a calling signal is applied to the portable telephone, a calling information sound such as music sound having a wide frequency range is reproduced as a calling sound by the second diaphragm.
  • a voice signal is converted into voice by the first diaphragm.
  • the voice coil driving force F is expressed as follows.
  • F BLi
  • B density of magnetic flux
  • L the effective length of coil
  • i the coil current
  • the magnetic flux is used in two magnetic gaps 11 and 12. Consequently, the density of the magnetic flux reduces compared with the case where the magnetic flux is applied to a single magnetic gap. Therefore, the coil driving force F becomes small, causing the sound pressure to reduce.
  • An object of the present invention is to provide a loudspeaker which may produce sufficient volume without increasing the size of the loudspeaker.
  • a loudspeaker comprising a case, a first diaphragm provided in the case, a second diaphragm provided in the case, a first voice coil for vibrating the first diaphragm, a second voice coil for vibrating the second diaphragm, a first permanent magnet for applying a magnetic flux to the first voice coil, and a second permanent magnet for applying a magnetic flux to the second voice coil.
  • Each of the first and second voice coils has an annular shape.
  • the loudspeaker further comprises an annular first magnetic gap, and an annular second magnetic gap, each of the magnetic gaps is formed between opposite magnetic members which are engaged with either of the first and second permanent magnets, and each of the first and second voice coils is disposed in either of first and second magnetic gaps.
  • the first permanent magnet has an annular shape
  • the second permanent magnet has a disc shape
  • the first permanent magnet is disposed outside the first and second magnetic gaps
  • the second permanent magnet is disposed inside the magnetic gaps.
  • the speaker has a cylindrical case 21 having an annular projection 21b inwardly projected from the inside wall of the case.
  • a pole piece 22 is secured to the inside wall of the projection 21b at a flange 22a.
  • An annular first permanent magnet 23 is secured to the underside of the flange 22a of the pole piece 22.
  • An annular first top plate 24 is secured to the underside of the first permanent magnet 23.
  • a second permanent magnet 25 having a disc shape is securely mounted on a center pole 22b at a recessed portion of the pole piece 22.
  • a second top plate 26 is secured to the upper surface of the second permanent magnet 25.
  • a first diaphragm 27 is secured to the upper surface of the case 21 at a peripheral portion thereof by a first protector 28.
  • a second diaphragm 30 is secured to the underside of the case 21 by a second protector 31.
  • an annular first voice coil 32 is secured, and an annular second voice coil 33 is secured to the upper surface of the second diaphragm 30.
  • the first voice coil 32 is disposed in an annular first magnetic gap 34 formed between the inside wall of a cylindrical portion 22c of the pole piece 22 and the outside wall of the second top plate 26.
  • the second voice coil 33 is disposed in an annular second magnetic gap 35 formed between the inside wall of the first top plate 24 and the outside wall of the cylindrical portion 22c of the pole piece 22.
  • a plurality of sound discharge holes 36 and 37 are provided in the first protector 28 and in the second protector 31, and a plurality of back holes 21a are formed in the case 21 in radial directions.
  • the first voice coil 32 and the first diaphragm 27 are used for a receiver for converting a voice signal into voice
  • the second voice coil 33 and the second diaphragm 30 are used for a speaker for reproducing a calling information sound in response to a calling signal.
  • a calling signal is applied to the portable telephone, a calling information sound such as music sound having a wide frequency range is reproduced as a calling sound by the second diaphragm.
  • a voice signal is converted into voice by the first diaphragm.
  • each of the diaphragms is operated by a large coil driving force, thereby generating a sound of a large volume.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP02253148A 2001-05-09 2002-05-03 Haut-parleur pour un dispositif de communication portatif Withdrawn EP1257148A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001139375A JP2002335597A (ja) 2001-05-09 2001-05-09 複合スピーカー
JP2001139375 2001-05-09

Publications (2)

Publication Number Publication Date
EP1257148A2 true EP1257148A2 (fr) 2002-11-13
EP1257148A3 EP1257148A3 (fr) 2007-02-14

Family

ID=18986159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02253148A Withdrawn EP1257148A3 (fr) 2001-05-09 2002-05-03 Haut-parleur pour un dispositif de communication portatif

Country Status (6)

Country Link
US (1) US6744895B2 (fr)
EP (1) EP1257148A3 (fr)
JP (1) JP2002335597A (fr)
KR (1) KR20020085811A (fr)
CN (1) CN1384653A (fr)
TW (1) TW546980B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004077879A1 (fr) 2003-02-27 2004-09-10 Namiki Seimitsu Houseki Kabushikikaisha Actionneur polyvalent et terminal mobile
WO2006049646A1 (fr) * 2004-10-29 2006-05-11 Sony Ericsson Mobile Communications Ab Ensembles formant haut-parleurs a double membrane avec des passages acoustiques et terminaux mobiles les comprenant
GB2461929A (en) * 2008-07-17 2010-01-20 Strong Pacific Earphones with compound drive units and level control
CN111698621A (zh) * 2019-03-14 2020-09-22 歌尔股份有限公司 发声装置和电子产品
CN113163307A (zh) * 2020-01-22 2021-07-23 Gp 声学国际有限公司 扬声器
WO2022081793A1 (fr) * 2020-10-14 2022-04-21 Bose Corporation Transducteur électroacoustique
SE2350973A1 (en) * 2023-08-16 2025-02-17 Marshall Group AB Magnetic circuit

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JP4716238B2 (ja) * 2000-09-27 2011-07-06 日本電気株式会社 携帯端末装置の音響再生システム及び方法
KR20040062387A (ko) * 2002-12-30 2004-07-07 주식회사 삼부커뮤닉스 음압의 충돌 방지를 위한 양방향성 스피커의 제조방법 및이에 의해 제조된 음압의 충돌 방지를 위한 양방향성 스피커
JP4557495B2 (ja) * 2003-02-18 2010-10-06 シチズン電子株式会社 電気音響変換器
JP2004343603A (ja) * 2003-05-19 2004-12-02 Matsushita Electric Ind Co Ltd スピーカ
US6785395B1 (en) * 2003-06-02 2004-08-31 Motorola, Inc. Speaker configuration for a portable electronic device
JP4111067B2 (ja) 2003-06-06 2008-07-02 松下電器産業株式会社 スピーカおよびこれを用いた携帯電話装置
US6963651B2 (en) * 2003-09-30 2005-11-08 Meiloon Industrial Co., Ltd. Single magnetic circuit dual output speaker
KR100612217B1 (ko) * 2003-11-08 2006-08-14 아이필유(주) 체감음향, 골 전도 및 진동모터 특성을 보유한 다기능 양방향 마이크로스피커
US20080074429A1 (en) * 2003-11-19 2008-03-27 Reuven Bakalash Multi-mode parallel graphics rendering system (MMPGRS) supporting real-time transition between multiple states of parallel rendering operation in response to the automatic detection of predetermined operating conditions
JP4215624B2 (ja) 2003-11-20 2009-01-28 シチズン電子株式会社 音響装置
JP2006191213A (ja) * 2004-12-28 2006-07-20 Citizen Electronics Co Ltd 電気音響変換器及び携帯端末装置
JP4661666B2 (ja) * 2006-04-07 2011-03-30 パナソニック株式会社 スピーカとそれを用いた電子機器
US8270661B2 (en) * 2007-06-20 2012-09-18 Gettop Europe R&D ApS High efficient miniature electro-acoustic transducer with reduced dimensions
US8189841B2 (en) * 2008-03-27 2012-05-29 Bose Corporation Acoustic passive radiating
CN201839425U (zh) * 2010-04-27 2011-05-18 常州美欧电子有限公司 双回路集成发声器件
EP2521375B1 (fr) * 2011-05-03 2014-04-16 Knowles Electronics Asia PTE. Ltd. Haut-parleur avec orifice comprenant un filtre de particule
CN202190382U (zh) * 2011-07-04 2012-04-11 常州美欧电子有限公司 发声器件
US8692635B2 (en) * 2012-04-18 2014-04-08 Nokia Corporation Sound generating apparatus
CN203912181U (zh) * 2014-04-30 2014-10-29 瑞声光电科技(常州)有限公司 扬声器
CN204069324U (zh) * 2014-07-18 2014-12-31 瑞声光电科技(常州)有限公司 发声器
ITUA20163268A1 (it) * 2015-05-22 2017-11-09 Ask Ind Spa Gruppo trasduttore elettro-acustico inerziale.
CN104994457A (zh) * 2015-07-08 2015-10-21 汉得利（常州）电子股份有限公司 一种中长距骨导驱动器
CN106101959B (zh) * 2016-07-18 2019-04-26 瑞声科技(新加坡)有限公司 扬声器
CN106303857A (zh) * 2016-09-07 2017-01-04 深圳天珑无线科技有限公司 双振膜扬声组件及扬声装置
IT201800001720A1 (it) * 2018-01-24 2019-07-24 Ask Ind Spa Poggiatesta per sedile di veicolo con altoparlante.
CN109040920A (zh) * 2018-07-26 2018-12-18 维沃移动通信有限公司 一种发声结构及终端
CN108966089A (zh) * 2018-10-09 2018-12-07 安庆市汇智科技咨询服务有限公司 一种扬声器
CN111327999B (zh) * 2020-03-05 2021-02-19 瑞声科技(新加坡)有限公司 扬声器箱
KR102799989B1 (ko) 2020-11-27 2025-04-23 엘지디스플레이 주식회사 진동 장치와, 이를 포함하는 장치 및 차량
CN112383854B (zh) * 2020-11-30 2022-05-03 瑞声新能源发展(常州)有限公司科教城分公司 发声装置
CN112738695B (zh) * 2020-12-28 2023-05-30 瑞声光电科技(常州)有限公司 扬声器
KR102488962B1 (ko) * 2021-03-26 2023-01-18 주식회사 알머스 이어폰용 스피커 유닛
EP4161096B1 (fr) * 2021-09-30 2025-05-28 Harman Becker Automotive Systems GmbH Haut-parleur
CN114866911B (zh) * 2022-04-02 2024-10-11 歌尔股份有限公司 发声模组和电子设备
CN217721458U (zh) * 2022-06-30 2022-11-01 瑞声光电科技(常州)有限公司 一种同轴扬声器
CN217721443U (zh) * 2022-06-30 2022-11-01 瑞声光电科技(常州)有限公司 耳机芯及耳机
CN217721459U (zh) * 2022-06-30 2022-11-01 瑞声光电科技(常州)有限公司 同轴扬声器
CN217721456U (zh) * 2022-06-30 2022-11-01 瑞声光电科技(常州)有限公司 同轴扬声器
JP7573655B2 (ja) * 2022-08-30 2024-10-25 エーエーシー マイクロテック（チャンヂョウ）カンパニー リミテッド 同軸スピーカー
JP7586939B2 (ja) * 2022-08-30 2024-11-19 エーエーシー マイクロテック（チャンヂョウ）カンパニー リミテッド 発音デバイス
US12279101B2 (en) * 2022-10-27 2025-04-15 Dell Products L.P. Ultra-slim force-canceling speaker structure
CN116847253B (zh) * 2023-06-07 2026-02-17 万魔声学股份有限公司 具有辐射环磁路的微型喇叭
JP2025098741A (ja) * 2023-12-20 2025-07-02 フォスター電機株式会社 スピーカ

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004077879A1 (fr) 2003-02-27 2004-09-10 Namiki Seimitsu Houseki Kabushikikaisha Actionneur polyvalent et terminal mobile
EP1599065A4 (fr) * 2003-02-27 2008-07-09 Namiki Precision Jewel Co Ltd Actionneur polyvalent et terminal mobile
WO2006049646A1 (fr) * 2004-10-29 2006-05-11 Sony Ericsson Mobile Communications Ab Ensembles formant haut-parleurs a double membrane avec des passages acoustiques et terminaux mobiles les comprenant
US7567680B2 (en) 2004-10-29 2009-07-28 Sony Ericsson Mobile Communications, Ab Dual-diaphragm speaker assemblies with acoustic passageways and mobile terminals including the same
GB2461929A (en) * 2008-07-17 2010-01-20 Strong Pacific Earphones with compound drive units and level control
CN111698621A (zh) * 2019-03-14 2020-09-22 歌尔股份有限公司 发声装置和电子产品
CN113163307A (zh) * 2020-01-22 2021-07-23 Gp 声学国际有限公司 扬声器
EP3855760A1 (fr) * 2020-01-22 2021-07-28 GP Acoustics International Limited Haut-parleur à bobines coaxiales et double diaphragme
WO2022081793A1 (fr) * 2020-10-14 2022-04-21 Bose Corporation Transducteur électroacoustique
SE2350973A1 (en) * 2023-08-16 2025-02-17 Marshall Group AB Magnetic circuit
WO2025036935A1 (fr) * 2023-08-16 2025-02-20 Marshall Group AB Circuit magnétique

Also Published As

Publication number Publication date
TW546980B (en) 2003-08-11
US20020168074A1 (en) 2002-11-14
EP1257148A3 (fr) 2007-02-14
KR20020085811A (ko) 2002-11-16
US6744895B2 (en) 2004-06-01
JP2002335597A (ja) 2002-11-22
CN1384653A (zh) 2002-12-11

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